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Badboy ZT Elite FR730v clutch bolt

#1

M

Mr G

I have a 2021 bad boy 54” fr730v engine and the clutch bolt loosens falls out breaks the 5 1/2” bolt that keeps the clutch from spinning. I hate already reinstalled the bolt with blue lock tight but that didn’t seem to hold after 1 hr bolt
Fell out again.
Any ideas to keep bolt and washer from
Coming loose?


#2

R

Rivets

If it came to me with this problem I would do the following. First, purchase a new bolt. Second, run a tap in the hole to clean the threads. Third, install the new bolt dry, torque properly.


#3

B

Bertrrr

I run them in with an Impact


#4

M

MParr

Get a new 7/16-20x1.5” grade 8 bolt.
You might need a 7/16-20 bottoming tap to chase the shaft threads.
Torque new bolt to 52 ft.lb.


#5

B

bertsmobile1

Clutches have few different set ups to stop the bolt backing out
Some use a split washer and others use a cupped washer
Very common to find the cupped washer on up side down
IT has to go dome to the bolt head so you are flattening it as you tighten
Also they do go flat over time & need replacing .
The crank gets too hot for anything other than red loktite to work .


#6

M

MParr

bertsmobile1 said:
Clutches have few different set ups to stop the bolt backing out
Some use a split washer and others use a cupped washer
Very common to find the cupped washer on up side down
IT has to go dome to the bolt head so you are flattening it as you tighten
Also they do go flat over time & need replacing .
The crank gets too hot for anything other than red loktite to work .
Click to expand...
As many times as that bolt has worked out, it’s a good possibility that the washer was lost.


#7

B

bertsmobile1

MParr said:
As many times as that bolt has worked out, it’s a good possibility that the washer was lost.
Click to expand...
And probably the spacer as well


#8

M

Mr G

bertsmobile1 said:
Clutches have few different set ups to stop the bolt backing out
Some use a split washer and others use a cupped washer
Very common to find the cupped washer on up side down
IT has to go dome to the bolt head so you are flattening it as you tighten
Also they do go flat over time & need replacing .
The crank gets too hot for anything other than red loktite to work .
Click to expand...
All,
When the local badboy dealer opens Monday I will get a new bolt and washer with some fresh locktite and use my impact to install. Then verify the torque is to specs.

Will give update to results. Appreciate all the reply’s!


#9

M

MParr

Mr G said:
All,
When the local badboy dealer opens Monday I will get a new bolt and washer with some fresh locktite and use my impact to install. Then verify the torque is to specs.

Will give update to results. Appreciate all the reply’s!
Click to expand...
Make sure that you get all of the parts that you need.


#10

M

Mr G

Mr G said:
I have a 2021 bad boy 54” fr730v engine and the clutch bolt loosens falls out breaks the 5 1/2” bolt that keeps the clutch from spinning. I hate already reinstalled the bolt with blue lock tight but that didn’t seem to hold after 1 hr bolt
Fell out again.
Any ideas to keep bolt and washer from
Coming loose?
Click to expand...
All, this is a delayed update. To last years issue but had to make sure the fix lasted.
So, I took the advise to replace the bolt and used fresh supply of locktite. I have put many hrs on since the new bolt and it’s held up no problems since.
Thanks for all your experience and time.
Mr G.


#11

R

RevB

Mr G said:
All, this is a delayed update. To last years issue but had to make sure the fix lasted.
So, I took the advise to replace the bolt and used fresh supply of locktite. I have put many hrs on since the new bolt and it’s held up no problems since.
Thanks for all your experience and time.
Mr G.
Click to expand...
Just for those reading this, the washer is a Belleville type that is cup shaped. The concave side goes toward the shaft the convex side toward the bolt head. If put on upside down the washer is just along for the ride and secures nothing.


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